First practiced in Majorca in the late 1970s, deep-water soloing is a form of high-difficulty solo rock climbing. This style of climbing takes place on tall sea cliffs at high tide. The climber swims from the shore to the bottom of the cliff and then begins free-climbing. The high sea level acts as a protection should the climber fall. This has to be the case as the routes are usually quite difficult and the climber commonly doesnêt use any harnesses or other protection. Most participants climb with someone on a boat nearby, so that if they do fall from a height and injure themselves, they can be rescued immediately. .